[Bug 1542106] Re: out-of-bounds read in MagickCore/memory.c:707:23

Seth Arnold 1542106 at bugs.launchpad.net
Fri Feb 5 03:16:36 UTC 2016


** Changed in: imagemagick (Ubuntu)
       Status: New => Confirmed

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Title:
  out-of-bounds read in MagickCore/memory.c:707:23

Status in imagemagick package in Ubuntu:
  Confirmed

Bug description:
  This bug was found while fuzzing ImageMagick with afl-fuzz

  Tested on ImageMagick git commit %s

  Command: magick id:000080,sig:06,src:000197,op:ext_AO,pos:146
  /dev/null

  =================================================================
  ==31853==ERROR: AddressSanitizer: global-buffer-overflow on address 0x0950c4bf at pc 0x818c1eb bp 0xbff345b8 sp 0xbff345b0
  READ of size 4096 at 0x0950c4bf thread T0
      #0 0x818c1ea in CopyMagickMemory /home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickCore/memory.c:707:23
      #1 0x888dfb8 in ExtractPostscript /home/user/Desktop/imagemagick_fuzz_results/ImageMagick/coders/wpg.c:787
      #2 0x887f751 in ReadWPGImage /home/user/Desktop/imagemagick_fuzz_results/ImageMagick/coders/wpg.c:1077
      #3 0x8a8ad6a in ReadImage /home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickCore/constitute.c:494
      #4 0x8a92bdf in ReadImages /home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickCore/constitute.c:844
      #5 0x9375c09 in CLINoImageOperator /home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickWand/operation.c:4685
      #6 0x937e0f1 in CLIOption /home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickWand/operation.c:5179
      #7 0x910ae9d in ProcessCommandOptions /home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickWand/magick-cli.c:474
      #8 0x910e215 in MagickImageCommand /home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickWand/magick-cli.c:786
      #9 0x91126f9 in MagickCommandGenesis /home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickWand/mogrify.c:172
      #10 0x80de16d in MagickMain /home/user/Desktop/imagemagick_fuzz_results/ImageMagick/utilities/magick.c:74
      #11 0x80de16d in main /home/user/Desktop/imagemagick_fuzz_results/ImageMagick/utilities/magick.c:85
      #12 0xb744ea82 in __libc_start_main /build/buildd/eglibc-2.19/csu/libc-start.c:287
      #13 0x80ddf94 in _start (/usr/local/bin/magick+0x80ddf94)

  0x0950c4bf is located 33 bytes to the left of global variable '.str2' from 'MagickCore/magick.c' (0x950c4e0) of size 34
    '.str2' is ascii string 'name != (const char *) ((void*)0)'
  0x0950c4bf is located 23 bytes to the right of global variable '__PRETTY_FUNCTION__.AcquireMagickInfo' from 'MagickCore/magick.c' (0x950c460) of size 72
    '__PRETTY_FUNCTION__.AcquireMagickInfo' is ascii string 'MagickInfo *AcquireMagickInfo(const char *, const char *, const char *)'
  SUMMARY: AddressSanitizer: global-buffer-overflow /home/user/Desktop/imagemagick_fuzz_results/ImageMagick/MagickCore/memory.c:707 CopyMagickMemory
  Shadow bytes around the buggy address:
    0x212a1840: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    0x212a1850: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    0x212a1860: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    0x212a1870: 00 00 00 00 00 00 00 00 00 00 00 00 04 f9 f9 f9
    0x212a1880: f9 f9 f9 f9 00 00 04 f9 f9 f9 f9 f9 00 00 00 00
  =>0x212a1890: 00 00 00 00 00 f9 f9[f9]f9 f9 f9 f9 00 00 00 00
    0x212a18a0: 02 f9 f9 f9 f9 f9 f9 f9 00 00 00 00 00 01 f9 f9
    0x212a18b0: f9 f9 f9 f9 00 00 02 f9 f9 f9 f9 f9 03 f9 f9 f9
    0x212a18c0: f9 f9 f9 f9 00 00 07 f9 f9 f9 f9 f9 05 f9 f9 f9
    0x212a18d0: f9 f9 f9 f9 00 00 00 00 00 01 f9 f9 f9 f9 f9 f9
    0x212a18e0: 00 00 00 00 00 00 00 f9 f9 f9 f9 f9 00 00 00 00
  Shadow byte legend (one shadow byte represents 8 application bytes):
    Addressable:           00
    Partially addressable: 01 02 03 04 05 06 07 
    Heap left redzone:     fa
    Heap right redzone:    fb
    Freed heap region:     fd
    Stack left redzone:    f1
    Stack mid redzone:     f2
    Stack right redzone:   f3
    Stack partial redzone: f4
    Stack after return:    f5
    Stack use after scope: f8
    Global redzone:        f9
    Global init order:     f6
    Poisoned by user:      f7
    ASan internal:         fe
  ==31853==ABORTING

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